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Cook C, Moreno Lopez R. Is molar incisor hypomineralisation (MIH) a new disease of the 21st century? PEDIATRIC DENTAL JOURNAL 2022. [DOI: 10.1016/j.pdj.2022.04.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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da Costa Rosa T, Pintor AVB, Magno MB, Marañón-Vásquez GA, Maia LC, Neves AA. Worldwide trends on molar incisor and deciduous molar hypomineralisation research: a bibliometric analysis over a 19-year period. Eur Arch Paediatr Dent 2022; 23:133-146. [PMID: 34674159 DOI: 10.1007/s40368-021-00676-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Accepted: 10/12/2021] [Indexed: 12/16/2022]
Abstract
AIM To identify the worldwide trends in scientific evidence and gaps in knowledge regarding molar incisor hypomineralisation (MIH) and deciduous molar hypomineralisation/hypomineralised second primary molars (DMH/HSPM), exploring the contribution of authors and countries, possible etiological factors and proposed treatments, in order to guide future research in the area. METHODS Searches were conducted in MEDLINE, Scopus, Web of Science, Cochrane Library, Lilacs/BBO, Embase and Google Scholar. Studies employing the terms MIH, DMH/HSPM and their linguistic variations were included. The following data were extracted: title, authors, year and journal of publication and first author's affiliation country. Studies were categorized according to topic, dentition, study design, etiological factors and types of treatments. Categories were analysed in relation to their distribution, co-occurrence, cross-correlation and/or autocorrelation. RESULTS Five hundred and three studies were included. The most published authors were Manton D (n = 47), de Souza JF (n = 22) and Ghanim A (n = 22) and four main collaboration clusters have been identified. Most of the studies were conducted on permanent dentition (MIH) (87.4%); with observational design (57.2%). The "European Archives of Paediatric Dentistry" was the most published journal (13.3%) and a significant increase in the number of publications was observed in the last decade. MIH was most studied in relation to prevalence/incidence, systemic factors involved in its aetiology and treatment with composite restorations, while a gap in knowledge was observed for extraction and sealants. Less studies were published on DMH/HSPM and most of them evaluated risk factors or prevalence/incidence. The gap of knowledge was observed in relation to treatments and patient's quality of life. CONCLUSIONS This bibliometric review provided a comprehensive overview of research in MIH and DMH/HSPM over the past 19 years. Within the limitations of the present study, the following conclusions can be drawn: global trends point to an increasing peak of scientific publication, especially in the last decade, while there is a shortage of clinical studies on treatments, mainly evaluating tooth extractions. Finally the multifactorial nature should be further explored, considering environmental and systemic factors together.
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Affiliation(s)
- T da Costa Rosa
- Department of Pediatric Dentistry and Orthodontics, School of Dentistry, Universidade Federal Do Rio de Janeiro, Rua Professor Rodolpho Paulo Rocco, 325-Cidade Universitária, Rio de Janeiro, RJ, CEP: 21941-971, Brazil
| | - A V B Pintor
- Department of Pediatric Dentistry and Orthodontics, School of Dentistry, Universidade Federal Do Rio de Janeiro, Rua Professor Rodolpho Paulo Rocco, 325-Cidade Universitária, Rio de Janeiro, RJ, CEP: 21941-971, Brazil
| | - M B Magno
- Department of Pediatric Dentistry and Orthodontics, School of Dentistry, Universidade Federal Do Rio de Janeiro, Rua Professor Rodolpho Paulo Rocco, 325-Cidade Universitária, Rio de Janeiro, RJ, CEP: 21941-971, Brazil
| | - G A Marañón-Vásquez
- Department of Pediatric Dentistry and Orthodontics, School of Dentistry, Universidade Federal Do Rio de Janeiro, Rua Professor Rodolpho Paulo Rocco, 325-Cidade Universitária, Rio de Janeiro, RJ, CEP: 21941-971, Brazil
| | - L C Maia
- Department of Pediatric Dentistry and Orthodontics, School of Dentistry, Universidade Federal Do Rio de Janeiro, Rua Professor Rodolpho Paulo Rocco, 325-Cidade Universitária, Rio de Janeiro, RJ, CEP: 21941-971, Brazil
| | - A A Neves
- Department of Pediatric Dentistry and Orthodontics, School of Dentistry, Universidade Federal Do Rio de Janeiro, Rua Professor Rodolpho Paulo Rocco, 325-Cidade Universitária, Rio de Janeiro, RJ, CEP: 21941-971, Brazil.
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Marouane O, Manton DJ. The use of transillumination in mapping demarcated enamel opacities in anterior teeth: A cross-sectional study. Int J Paediatr Dent 2022; 32:49-55. [PMID: 33728689 DOI: 10.1111/ipd.12790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Revised: 03/08/2021] [Accepted: 03/09/2021] [Indexed: 11/30/2022]
Abstract
BACKGROUND Despite intensive efforts for categorizing demarcated enamel opacities, often related to molar incisor hypomineralization (MIH), there is a lack of descriptive criteria aiming to describe them physically outside the scope of color and size. This is most likely due to the indices focusing on molar, not anterior, teeth. AIM To map and classify demarcated lesions on permanent anterior teeth using reflected and transilluminated light. The association between classification and related lesion characteristics was also examined. DESIGN Permanent anterior teeth with demarcated opacities related to MIH were selected. For each tooth, standardized photographs were taken using transmitted and reflected light. Each lesion was mapped and classified according to its color, lesion size, surface integrity, and type. The data were analyzed using the chi-square and Fisher's exact tests. A logistic regression analysis was performed to identify the risk of PEB. RESULTS There were significant relationships between lesion size, color, and type with surface integrity. Lesion type and size were more important than lesion color for assessing the risk of PEB. There was also a significant relationship between lesion size and lesion color. CONCLUSIONS Lesion size and type are significant clinical parameters for assessing the risk of PEB on enamel opacities related to MIH.
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Affiliation(s)
- Omar Marouane
- Private Practice, Restorative dentistry and Endodontics, Oralys Dental Clinic, Tunis, Tunisia
| | - David J Manton
- Paediatric Dentistry and Cariology, Centrum voor Tandheelkunde en Mondzorgkunde, UMCG, University of Groningen, Groningen, The Netherlands
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Rizzardi KF, da Silva Toledo E, Ferraz LFC, Darrieux M, Girardello R, de Lima Marson FA, Parisotto TM. Association between asthma and enamel defects in primary and young permanent teeth - A systematic review. Pediatr Pulmonol 2022; 57:26-37. [PMID: 34698451 DOI: 10.1002/ppul.25737] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Revised: 09/20/2021] [Accepted: 10/18/2021] [Indexed: 11/06/2022]
Abstract
Childhood respiratory diseases, such as asthma, are important public health problems worldwide and could be associated with tooth enamel defects. This study aimed to verify the relationship between asthma and enamel defects in teeth, to answer the following question: "Could asthma in children be significantly associated with enamel defects in deciduous dentition and young permanent teeth?." PUBMED-MEDLINE, EMBASE, LILACS, and COCHRANE databases were systematically searched and assessed articles (2000-2021) were cautiously scored according to a predetermined criterion. The Preferred Reporting Items for Systematic Reviews and Meta-Analyses were considered. Twenty-two articles were critically appraised and used as a basis for conclusions. The relationship between asthma and enamel defects was confirmed in the majority of appraised papers, one with a high level of evidence, nine with a moderate level, and four with a low level. Out of the eight manuscripts investigating the influence of asthma medication on enamel defects, only three (one with high, one moderate, and another with a low level of evidence) suggested an association. It can be concluded that asthma is closely connected with enamel defects in young permanent teeth. However, as most of the papers appraised were of cross-sectional or case-control design, further well-designed clinical investigations with a prospective design are welcome to reinforce our findings.
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Affiliation(s)
- Karina F Rizzardi
- Laboratory of Clinical and Molecular Microbiology, University São Francisco, Bragança Paulista, São Paulo, Brazil
| | - Elora da Silva Toledo
- Laboratory of Clinical and Molecular Microbiology, University São Francisco, Bragança Paulista, São Paulo, Brazil
| | - Lucio F C Ferraz
- Laboratory of Clinical and Molecular Microbiology, University São Francisco, Bragança Paulista, São Paulo, Brazil
| | - Michelle Darrieux
- Laboratory of Clinical and Molecular Microbiology, University São Francisco, Bragança Paulista, São Paulo, Brazil
| | - Raquel Girardello
- Laboratory of Clinical and Molecular Microbiology, University São Francisco, Bragança Paulista, São Paulo, Brazil
| | | | - Thaís M Parisotto
- Laboratory of Clinical and Molecular Microbiology, University São Francisco, Bragança Paulista, São Paulo, Brazil
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Lygidakis NA, Garot E, Somani C, Taylor GD, Rouas P, Wong FSL. Best clinical practice guidance for clinicians dealing with children presenting with molar-incisor-hypomineralisation (MIH): an updated European Academy of Paediatric Dentistry policy document. Eur Arch Paediatr Dent 2022; 23:3-21. [PMID: 34669177 PMCID: PMC8926988 DOI: 10.1007/s40368-021-00668-5] [Citation(s) in RCA: 89] [Impact Index Per Article: 44.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2021] [Accepted: 09/22/2021] [Indexed: 12/16/2022]
Abstract
AIM To update the existing European Academy of Paediatric Dentistry (EAPD) 2010 policy document on the 'Best Clinical Practice guidance for clinicians dealing with children presenting with Molar-Incisor-Hypomineralisation (MIH).' METHODS Experts, assigned the EAPD, worked on two different topics: (A) Aetiological factors involved in MIH, and (B) Treatment options for the clinical management of MIH. The group prepared two detailed systematic reviews of the existing literature relevant to the topics and following a consensus process produced the updated EAPD policy document on the 'Best Clinical Practice guidance for clinicians dealing with children presenting with molar-incisor-hypomineralisation (MIH).' The GRADE system was used to assess the quality of evidence regarding aetiology and treatment which was judged as HIGH, MODERATE, LOW or VERY LOW, while the GRADE criteria were used to indicate the strength of recommendation regarding treatment options as STRONG or WEAK/CONDITIONAL. RESULTS (A) Regarding aetiology, it is confirmed that MIH has a multifactorial aetiology with the duration, strength and timing of occurrence of the aetiological factors being responsible for the variable clinical characteristics of the defect. Perinatal hypoxia, prematurity and other hypoxia related perinatal problems, including caesarean section, appear to increase the risk of having MIH, while certain infant and childhood illnesses are also linked with MIH. In addition, genetic predisposition and the role of epigenetic influences are becoming clearer following twin studies and genome and single-nucleotide polymorphisms analyses in patients and families. Missing genetic information might be the final key to truly understand MIH aetiology. (B) Regarding treatment options, composite restorations, preformed metal crowns and laboratory indirect restorations provide high success rates for the posterior teeth in appropriate cases, while scheduled extractions provide an established alternative option in severe cases. There is great need for further clinical and laboratory studies evaluating new materials and non-invasive/micro-invasive techniques for anterior teeth, especially when aesthetic and oral health related quality of life (OHRQoL) issues are concerned. CONCLUSIONS MIH has been studied more extensively in the last decade. Its aetiology follows the multifactorial model, involving systemic medical and genetic factors. Further focused laboratory research and prospective clinical studies are needed to elucidate any additional factors and refine the model. Successful preventive and treatment options have been studied and established. The appropriate choice depends on the severity of the defects and the age of the patient. EAPD encourages the use of all available treatment options, whilst in severe cases, scheduled extractions should be considered.
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Affiliation(s)
- N A Lygidakis
- Private Paediatric Dental Clinic, 2 Papadiamantopoulou Street, 11528, Athens, Greece.
| | - E Garot
- Univ. de Bordeaux, UFR des Sciences Odontologiques, Bordeaux, France
- CHU de Bordeaux, Pôle médecine et chirurgie bucco-dentaire, Pellegrin, Bordeaux, France
- Univ. de Bordeaux, PACEA, UMR 5199, Pessac, France
| | - C Somani
- Paediatric Dentistry, Institute of Dentistry, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - G D Taylor
- School of Dental Sciences, Faculty of Medical Sciences, Newcastle University, Newcastle upon Tyne, UK
| | - P Rouas
- Univ. de Bordeaux, UFR des Sciences Odontologiques, Bordeaux, France
- CHU de Bordeaux, Pôle médecine et chirurgie bucco-dentaire, Pellegrin, Bordeaux, France
- Univ. de Bordeaux, PACEA, UMR 5199, Pessac, France
| | - F S L Wong
- Paediatric Dentistry, Institute of Dentistry, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, UK
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Kühnisch J, Standl M, Hickel R, Heinrich J. [Molar incisor hypomineralisation (MIH)-discussion of prevalence and etiology with special reference to the results from the Munich birth cohorts GINIplus and LISA]. Bundesgesundheitsblatt Gesundheitsforschung Gesundheitsschutz 2021; 64:924-930. [PMID: 34213569 PMCID: PMC8316183 DOI: 10.1007/s00103-021-03366-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Accepted: 05/31/2021] [Indexed: 11/05/2022]
Abstract
After caries, molar incisor hypomineralisation (MIH)-also known as chalky teeth-is one the most common dental diseases in children and adolescents. In addition to aesthetic limitations, especially on the anterior teeth, hypersensitivities and enamel breakdowns on permanent molars are of functional importance. While the MIH prevalence rates range from ~ 10% to ~ 30% and is well described, the situation regarding aetiology is unsatisfactory. Although efforts have been made in the past to clarify the aetiology, no plausible reason is available so far. Aetiology research has to be judged as methodologically challenging, since it should ideally be embedded in prospectively planned birth cohort studies. The aim of this article is to summarize typical clinical characteristics of MIH, epidemiological findings and potential causes with special reference to the earlier published results from the two Munich birth cohort studies GINIplus and LISA.
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Affiliation(s)
- Jan Kühnisch
- Poliklinik für Zahnerhaltung und Parodontologie, Klinikum der Universität München, Ludwig-Maximilians-Universität München, München, Deutschland.
| | - Marie Standl
- Institut für Epidemiologie, Helmholtz Zentrum München - Deutsches Forschungszentrum für Gesundheit und Umwelt, Neuherberg, Deutschland
| | - Reinhard Hickel
- Poliklinik für Zahnerhaltung und Parodontologie, Klinikum der Universität München, Ludwig-Maximilians-Universität München, München, Deutschland
| | - Joachim Heinrich
- Institut für Epidemiologie, Helmholtz Zentrum München - Deutsches Forschungszentrum für Gesundheit und Umwelt, Neuherberg, Deutschland
- Institut und Poliklinik für Arbeits‑, Sozial- und Umweltmedizin, Klinikum der Universität München, Ludwig-Maximilians-Universität München, München, Deutschland
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Irigoyen‐Camacho ME, Villanueva‐Gutierrez T, Castano‐Seiquer A, Molina‐Frechero N, Zepeda‐Zepeda M, Sánchez‐Pérez L. Evaluating the changes in molar incisor hypomineralization prevalence: A comparison of two cross-sectional studies in two elementary schools in Mexico City between 2008 and 2017. Clin Exp Dent Res 2020; 6:82-89. [PMID: 32067391 PMCID: PMC7025996 DOI: 10.1002/cre2.252] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Revised: 08/21/2019] [Accepted: 08/29/2019] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Little information is available on the trends over time of the prevalence of molar incisor hypomineralization (MIH). This condition may be preventing dental caries decline. AIM (a) To compare the prevalence of MIH, in Mexico City schoolchildren, evaluated in 2008 with a group evaluated in 2017, (b) to identify the association of MIH with dental caries, and (c) to assess the mother's perception of her child's oral health status. DESIGN Two cross-sectional studies performed in 2008 and in 2017 were compared. The oral examiner and the selected schools were the same in both surveys. RESULTS A total of 549 schoolchildren were evaluated. The prevalence of MIH in the first survey was 20.3%, and 31.9 % in the second survey, (p = .002). Children with MIH were more likely to have dental caries. The odds ratio was 2.24 (p = .036) and 4.18 (p ˂ .001) in the first and second surveys, respectively. Mothers of children with MIH perceived worse oral health status of their children than the mothers whose children did not have MIH (odds ratio = 4.47, p ˂ .001). CONCLUSION The findings portray a clear increase in prevalence of MIH and highlight the need for increased awareness about this condition among dentists and the general population.
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Affiliation(s)
| | | | | | - Nelly Molina‐Frechero
- Health Care DepartmentMetropolitan Autonomous University‐XochimilcoMexico CityMexico
| | - Marco Zepeda‐Zepeda
- Health Care DepartmentMetropolitan Autonomous University‐XochimilcoMexico CityMexico
| | - Leonor Sánchez‐Pérez
- Health Care DepartmentMetropolitan Autonomous University‐XochimilcoMexico CityMexico
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Gatón-Hernandéz P, Serrano CR, da Silva LAB, de Castañeda ER, da Silva RAB, Pucinelli CM, Manton D, Ustrell-Torrent JM, Nelson-Filho P. Minimally interventive restorative care of teeth with molar incisor hypomineralization and open apex-A 24-month longitudinal study. Int J Paediatr Dent 2020; 30:4-10. [PMID: 31593607 DOI: 10.1111/ipd.12581] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Revised: 08/29/2019] [Accepted: 09/24/2019] [Indexed: 11/29/2022]
Abstract
AIM To assess the efficacy of treatment using a minimally invasive approach (selective removal of carious tissue, restoration and preventive strategies) in immature permanent molars with MIH. DESIGN A total of 281 patients, aged 6-8 years, with carious lesions (ICDAS 5-6), severe MIH, and incomplete root formation (one tooth/patient) were included. After clinical and radiographic examinations, selective carious tissue removal was performed, and the teeth received interim restoration for 6 months and were then restored with composite resin. Clinical and radiographic follow-up was undertaken, 6, 12, 18, and 24 months. A protocol of preventive oral care measures was established and repeated at each follow-up, including diet counselling, oral hygiene instruction, dental plaque control, and topical application of fluoride varnish containing CPP-ACP. All clinical procedures and evaluations were done by a single operator. RESULTS Clinical and radiographic success was observed 24 months after treatment in 96.8% of the cases. Failures were due to enamel fracture at restoration margins, resulting in pulpitis and absence of apex closure. CONCLUSION Selective removal of carious tissue, interim, and subsequently definitive restoration, combined with home and professional preventive measures, maintained marginal integrity of restorations in immature permanent molars with severe MIH, confirmed by pulp vitality and occurrence of apexogenesis.
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Affiliation(s)
| | | | | | | | | | | | - David Manton
- Growth and Development, Melbourne Dental School, University of Melbourne, Melbourne, Vic., Australia.,School of Dentistry, University of Groningen, Groningen, Netherlands
| | | | - Paulo Nelson-Filho
- School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
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Zilberman U, Hassan J, Leiboviz-Haviv S. Molar incisor hypomineralization and pre-eruptive intracoronal lesions in dentistry-diagnosis and treatment planning. World J Stomatol 2019; 7:20-27. [DOI: 10.5321/wjs.v7.i2.20] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Revised: 01/14/2019] [Accepted: 01/28/2019] [Indexed: 02/06/2023] Open
Abstract
The aim of this study is to report the diagnostic features, prevalence, mineral content, clinical significance and treatment options of molar incisor hypomineralization (MIH) and pre-eruptive intracoronal lesions (PEIR), in order to minimize miss-treatment of primary and permanent teeth in young children. MIH was defined as the occurrence of hypomineralization of one up to four permanent first molars from a systemic origin and frequently associated with affected incisors. PEIR are lesions that are located in the occlusal portion of the crown of unerupted permanent or primary teeth. The prevalence of MIH was reported between 2.5%-40% in the permanent first molars and 0%-21.8% in primary second molars. PEIR was observed in 2%-8% of children, mainly in mandibular second premolars and second and third permanent molars. A number of possible causes for MIH were mentioned, including environmental changes, diet and genetics in prenatal and postnatal periods, but all are questionable. In PEIR, the resorption of the intracoronal dentine begins only after crown development is complete and is caused by giant cells resembling osteoclast observed histologically on the dentine surface close to the pulp. The mineral content in MIH is reduced in comparison to normal enamel and dependent on the severity of the lesion. In PEIR the resorbed surface of enamel showed less mineral content. The hypomineralized enamel in MIH is not suitable for restorations with amalgam or composite materials, and the best material should be based on remineralization material like glass-ionomers. Similar, the resorbed dentin surface in PEIR should be covered by the biocompatible and re-mineralizing glass-ionomer cement.
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Affiliation(s)
- Uri Zilberman
- Pediatric Dental Clinic, Barzilai Medical University Center, Ashkelon 7830604, Israel
| | - Jomanna Hassan
- Pediatric Dental Clinic, Barzilai Medical University Center, Ashkelon 7830604, Israel
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Gualdi-Russo E, Zedda N, Esposito V, Masotti S. More on molar incisor hypomineralisation (MIH) and linear enamel hypoplasia (LEH) in archaeological human remains. Clin Oral Investig 2017; 21:2153-2154. [DOI: 10.1007/s00784-017-2182-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Accepted: 07/11/2017] [Indexed: 10/19/2022]
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Analytical evidence of enamel hypomineralisation on permanent and primary molars amongst past populations. Sci Rep 2017; 7:1712. [PMID: 28490768 PMCID: PMC5431767 DOI: 10.1038/s41598-017-01745-w] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2017] [Accepted: 04/12/2017] [Indexed: 02/06/2023] Open
Abstract
Molar Incisor Hypomineralisation (MIH) and Hypomineralised Second Primary Molars (HSPM) involve prevalent qualitative structural developmental anomalies of tooth enamel affecting the first permanent molars (and often incisors) and the second primary molars, respectively. These demarcated hypomineralised lesions of enamel manifest as white-cream or yellow-brown opacities, with possible post-eruptive localised loss of enamel. Aetiological hypotheses have involved contemporary life factors (i.e. environmental pollutant exposure or early childhood medications) in contrast to factors not limited to a specific time period (i.e. hypoxia at birth or genetic predisposition). Evidence of MIH in ancient populations would reinforce aetiological factors present for many centuries. By means of microtomographic and X-ray fluorescence analyses the present study provides evidence that (i) two archaeological specimens: “S407” (Sains-en-Gohelle, France, 12th–16th centuries) and “B335” (Beauvais, France, 15th–18th centuries) were MIH-affected, and (ii) one individual “S323” was affected by HSPM and MIH (Sains-en-Gohelle, France, 7th–11th centuries).
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